Townee k



` T. K.. WEBSTER 81; J; CHIVILL.

SGREW GONVBYERGOUPLING.

Pateted` Feb. 6, 1888.

N. Frigus mmmnggnprwr. wmhmgmvmc,

UNITED l STATES PATENT OFFICE.

TOWNER K. WEBSTER AND JOHN CHIVILL, OF CHICAGO, ILL., ASSIGNORS TO`WEBSTER & COMSTOCK MANUFACTURING COMPANY, OF SAME PLACE.

se REW-CONVEYER coUPLl NG.

t SPECIFICATION forming part of Letters Patent No. 272,006, datedFebruary 6, '1883.

i Application filed December 26, i882. (No model.)

To all whom it may concern Be it known that we, TowNER K. WEBSTER andJOHN CHIVILL, of Chicago, in the county of Cook and State ot' Illinois,have invented certain new and useful Improvementsin Screw- ConveyerCouplings, of which vthe following, in connection with the accompanyingdrawings, is a specification..

In the drawings, Figure 1 is a side view of Io a screw-couveyer couplingembodying our invention. Fig. 2 is a central longitudinal vertical4section thereof. Fig. 3 is an end view of the same, and Fig. 4 is asection in the plane of the line a :vof Fig. 2. r5 Like letters ofreference indicate like parts. Screw-conveyers are usually constructedin sections, which are connected together for use by means ofbolt-couplings'. The conveyershafts are-usually hollow""or tubular,andthe 2O ends ofthese tubular sections have been reen'forced by-meansof collars or ferrules. Cylindrical plugs have also been inserted intothe adjacent ends of the tubular sections, a plug passing lfrom the endof one section into the end of the next section, and serving as ajournalfor supporting the conveyer in hangers. Boltshave passed through thesecollars, tubular` sections, and plugs for the purpose of securelyconnecting all the parts together for 3o work. An objectionablefeaturein screw-conveyers coupled in this manner is that as there is atwisting strain produced by the movement of the conveyer this strain isfelt by the bolts, and frequently to such an extent as to cause 3 5 themto wear through the pipeud thus break or impair the connection ofthesections. We aim to obviatethis objection by makingin the lends ofeach section a comparatively deep or long cut or slot, and by making oneachl col- 40 lar or ferrule` an inwardly-projectin g rib or featheradapted to enter the said cuts or slots in the ends of the tubularsections. We also make corresponding grooves at the ends of the couplingplugs or cores, all of which will 4 5 be hereinafter more fullyexplained.

pass through the cuts or slots C C and enter the grooves E E', as shown.

F F are bolts passing through the f'errules 6o DD, through the feathersD' D', and through the plug E, and F F are nuts ou the said bolts.

Gr is the hanger for supporting the conveyer, and the plugs E E rotateor turn in these hangers with theA con veyer-shat't.

It Will be perceived from the foregoing description and from referenceto the drawings that the ribs or feathers'z-.HE D' take the torsional ortwisting strain resulting from the ro- 7o tation ofthe conveyer and theresistance offered in doing work, and that the bolts are therebyrelieved of this strain, and thereby prevented from cutting the tubularsections.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

The combinatiouot' the tubular sections A A, having therein the cuts orslots C C, Athe collars or ferrules D D, having thereon thein- 8o terualribs or feathers, D7 D', the plug or core E, having therein the groovesE' E', and the -bolts and nuts, all adapted for arrangement togethersubstantially as described, and for the purposes set forth.

TOWNER K. WEBSTER. JOHN CHIVILL.` Witnesses: N. CowLEs,

J. H. AVERYe

